llvm-svn: 225929

The form of nops used is CPU-specific (some CPUs, such as the POWER7, have
special group-terminating nops). We probably want a different callback for this
kind of nop insertion (something more like MCAsmBackend::writeNopData), or for
PPC to use a different mechanism for scheduling nops, but this will stop the
test from failing for now.

llvm-svn: 225928

This reduces coverage for Evergreen, since the more
complete tests have those run lines disabled.

llvm-svn: 225927

Don't do the v4i8 -> v4f32 combine if the load will need to
be expanded due to alignment. This stops adding instructions
to repack into a single register that the v_cvt_ubyteN_f32
instructions read.

llvm-svn: 225926

Now that the source and destination types can be specified,
allow doing an expansion that doesn't use an EXTLOAD of the
result type. Try to do a legal extload to an intermediate type
and extend that if possible.

This generalizes the special case custom lowering of extloads
R600 has been using to work around this problem.

This also happens to fix a bug that would incorrectly use more
aligned loads than should be used.

llvm-svn: 225925

llvm-svn: 225924

Extend PipePosix with support for named pipes/timeout-based IO and integrate it with GDBRemoteCommunication / lldb-gdbserver - include reviews fixes.

http://reviews.llvm.org/D6954

llvm-svn: 225923

These are implemented with __builtin_shufflevector just like AVX.

We have some tests on the LLVM side to assert that these shufflevectors do
indeed generate the corresponding unpck instruction.

Part of <rdar://problem/17688758>

llvm-svn: 225922

Part of PR21433.

llvm-svn: 225921

llvm-svn: 225920

Should fix the bots after r225890.

llvm-svn: 225919

The new logic isn't actually reachable yet, so no functionality change.

llvm-svn: 225918

llvm-svn: 225917

llvm-svn: 225915

Still doesn't handle distinct ones.  Part of PR21433.

llvm-svn: 225914

The machine scheduler is still disabled by default.

The schedule model is not complete yet, and could be improved.

llvm-svn: 225913

llvm-svn: 225912

llvm-svn: 225911

A pass that adds random noops to X86 binaries to introduce diversity with the goal of increasing security against most return-oriented programming attacks.

Command line options:
  -noop-insertion // Enable noop insertion.
  -noop-insertion-percentage=X // X% of assembly instructions will have a noop prepended (default: 50%, requires -noop-insertion)
  -max-noops-per-instruction=X // Randomly generate X noops per instruction. ie. roll the dice X times with probability set above (default: 1). This doesn't guarantee X noop instructions.

In addition, the following 'quick switch' in clang enables basic diversity using default settings (currently: noop insertion and schedule randomization; it is intended to be extended in the future).
  -fdiversify

This is the clang part of the patch.
llvm part: D3392

http://reviews.llvm.org/D3393
Patch by Stephen Crane (@rinon)

llvm-svn: 225910

This re-applies r225808, fixed to avoid problems with SDAG dependencies along
with the preceding fix to ScheduleDAGSDNodes::RegDefIter::InitNodeNumDefs.
These problems caused the original regression tests to assert/segfault on many
(but not all) systems.

Original commit message:

This commit does two things:

 1. Refactors PPCFastISel to use more of the common infrastructure for call
    lowering (this lets us take advantage of this common code for lowering some
    common intrinsics, stackmap/patchpoint among them).

 2. Adds support for stackmap/patchpoint lowering. For the most part, this is
    very similar to the support in the AArch64 target, with the obvious differences
    (different registers, NOP instructions, etc.). The test cases are adapted
    from the AArch64 test cases.

One difference of note is that the patchpoint call sequence takes 24 bytes, so
you can't use less than that (on AArch64 you can go down to 16). Also, as noted
in the docs, we take the patchpoint address to be the actual code address
(assuming the call is local in the TOC-sharing sense), which should yield
higher performance than generating the full cross-DSO indirect-call sequence
and is likely just as useful for JITed code (if not, we'll change it).

StackMaps and Patchpoints are still marked as experimental, and so this support
is doubly experimental. So go ahead and experiment!

llvm-svn: 225909

A pass that adds random noops to X86 binaries to introduce diversity with the goal of increasing security against most return-oriented programming attacks.

Command line options:
  -noop-insertion // Enable noop insertion.
  -noop-insertion-percentage=X // X% of assembly instructions will have a noop prepended (default: 50%, requires -noop-insertion)
  -max-noops-per-instruction=X // Randomly generate X noops per instruction. ie. roll the dice X times with probability set above (default: 1). This doesn't guarantee X noop instructions.

In addition, the following 'quick switch' in clang enables basic diversity using default settings (currently: noop insertion and schedule randomization; it is intended to be extended in the future).
  -fdiversify

This is the llvm part of the patch.
clang part: D3393

http://reviews.llvm.org/D3392
Patch by Stephen Crane (@rinon)

llvm-svn: 225908

PATCHPOINT is a strange pseudo-instruction. Depending on how it is used, and
whether or not the AnyReg calling convention is being used, it might or might
not define a value. However, its TableGen definition says that it defines one
value, and so when it doesn't, the code in ScheduleDAGSDNodes::RegDefIter
becomes confused and the code that uses the RegDefIter will try to get the
register class of the MVT::Other type associated with the PATCHPOINT's chain
result (under certain circumstances).

This will be covered by the PPC64 PatchPoint test cases once that support is
re-committed.

llvm-svn: 225907

llvm-svn: 225906

llvm-svn: 225905

This adds handling for ExceptionHandling::MSVC, used by the
x86_64-pc-windows-msvc triple. It assumes that filter functions have
already been outlined in either the frontend or the backend. Filter
functions are used in place of the landingpad catch clause type info
operands. In catch clause order, the first filter to return true will
catch the exception.

The C specific handler table expects the landing pad to be split into
one block per handler, but LLVM IR uses a single landing pad for all
possible unwind actions. This patch papers over the mismatch by
synthesizing single instruction BBs for every catch clause to fill in
the EH selector that the landing pad block expects.

Missing functionality:
- Accessing data in the parent frame from outlined filters
- Cleanups (from __finally) are unsupported, as they will require
  outlining and parent frame access
- Filter clauses are unsupported, as there's no clear analogue in SEH

In other words, this is the minimal set of changes needed to write IR to
catch arbitrary exceptions and resume normal execution.

Reviewers: majnemer

Differential Revision: http://reviews.llvm.org/D6300

llvm-svn: 225904

Although this makes the `cast<>` assert more often, the
`assert(Node->isResolved())` on the following line would assert in all
those cases.  So, no functionality change here.

llvm-svn: 225903

llvm-svn: 225902

llvm-svn: 225901

DIEDwarfExpression (and get rid of a bunch of redundant code).

NFC

llvm-svn: 225900

status in a bool and let the users deal with the error.

NFC.

llvm-svn: 225899

needs to be accessed from both DwarfCompileUnit.cpp and DwarfUnit.cpp.

NFC.

llvm-svn: 225898

llvm-svn: 225897

Working towards supporting `MDLocation` in `MapMetadata()`.

llvm-svn: 225896

It turns out, all callsites of the simplifier are guarded by a check for
CallInst::getCalledFunction (i.e., to make sure the callee is direct).

This check wasn't done when trying to further optimize a simplified fortified
libcall, introduced by a refactoring in r225640.

Fix that, add a testcase, and document the requirement.

llvm-svn: 225895

There are too many available sanitizers now - redirect to
user manual instead of listing them all.

llvm-svn: 225894

llvm-svn: 225893

llvm-svn: 225892

the TargetMachine level and the MC level.

llvm-svn: 225891

Patch by Brad Smith.

llvm-svn: 225890

type. Patch by Stephan Bergmann!

llvm-svn: 225889